12 



Art. 10.— K. :M:i.tsuno 



in (II): if it were so, [Co Cl '.H^O), (NH,).,] ÖO^ sliould have the con- 

 figuration of the type (I») as indicated l)y tlie above equation (3). 

 However this is not in keeping with experimental results, tliere- 

 fore it must he eitlier as shown in (I) or (III). If it were like (I), 

 then since the possibility of producing the chlorotriaquodiammine 

 cobaltic salts shown by (A) and (B) slîould be exactly equal the 

 product obtained from it would be a mixture of tliese two isomers. 

 But the compound thus obtained, i.e. [Co CI (HsO)^ (NH3)2] SO, 

 crystaUizes homogeneously and the absorption curve tliereof 

 suggests to us that the three water molecules are in the eis and 

 consecutive position as shown by (A). Accordingly the above 

 dichlorodiaquodiammine cobaltic salt has tlie constitution of the 

 type (III), thus : — 



NH, 



. NIIj 



B.,0' 



SO4H 



H,0 



And also from the consideration of tlie colour, we can conhrn) 

 this configuration, comparing it with tlie compounds whicli liave 

 analogous configurations and the same colour, thus: — 



(green) 



CI 



CI 



